Replace valve seat rings

AR05.30-B-3831D

Replace valve seat rings

12.02.16



Remove

1

Remove the valves

Engines 457.9 vehicles 382.15, 693, 695, 696

AR05.30-B-3511E

Engines 457.9 vehicles 958.4

AR05.30-B-3511TC

2

Check the valve guide bore



*636589002100

 If the side with the largest diameter "+" of the gauge enters the guide, measure the diameter at the center of the length thereof (wear limit).

If the value obtained exceeds the wear limit 

*BE05.30-B-1003-02B

Replace the valve guide

Engines 457.9 in vehicles 382.15, 634.0, 693, 694, 695, 696

AR05.30-B-3731D

Replace the valve guide

Engines 457.9 in vehicles 958.4

AR05.30-B-3731TC

3

Remove the valve seat (1.2) from the head

 The seat can also be removed by machining it to a thickness of 0.5 mm, then removing it from an appropriate chisel.

AR05.30-B-3831-01A



*000589283300



*000589293300



*000589343300

4

Check the condition and dimensions of the seat housing in the head (3)

 The interference between the seat (diameter A) and housing (diameter B) should be unconditionally obtained.

Diameter (B) of the intake seat housing.

*BE05.30-B-1003-03D

Diameter (B) of the exhaust seat housing.

*BE05.30-B-1004-03D

Depth (C) of the intake seat housing.

*BE05.30-B-1009-03D

Depth (C) of the exhaust seat housing.

*BE05.30-B-1010-03D

Interference between the seat and the housing.

*BE05.30-B-1005-03D



*001589532100

Internal diameters measuring gauge from 35 to 60 mm

5

If necessary, rework the valve seat housing on the head (3)

AR05.30-B-3831-02C

Diameter (B) of the intake seat housing.

*BE05.30-B-1003-03D

Diameter (B) of the exhaust seat housing.

*BE05.30-B-1004-03D

Depth (C) of the intake seat housing.

*BE05.30-B-1009-03D

Depth (C) of the exhaust seat housing.

*BE05.30-B-1010-03D



*001589532100

Internal diameters measuring gauge from 35 to 60 mm



Installing

6

Select a new valve seat (1,2) for the installation

 To obtain the recommended interference, the seat repair level should match the level for the housing.

*BE05.30-B-1005-03D

Outside diameter (A) of the inlet seat.

*BE05.30-B-1001-03D

Outside diameter (A) of the exhaust seat

*BE05.30-B-1002-03D

Height (D) of the intake valve seat.

*BE05.30-B-1006-03D

Height (D) of the exhaust valve seat.

*BE05.30-B-1007-03D

External micrometer, from 0 to 25 mm

External micrometer, from 25 to 50 mm

Danger!

Risk of injury when handling liquid nitrogen or touching super-chilled objects. Risk of suffocation by inhalation of nitrogen gas

Wear thermal protection gloves, protective clothing and full protective safety goggles. Ensure sufficient ventilation

AS00.00-B-0003-01A

7

Place the seat (1.2) in the cooling box with liquid nitrogen

Cool the seats for 20 to 30 minutes.



*346589006300

8

Heat the head (1) in water bath

Approximate temperature 80 °C.

9

Using long-nose pliers, remove the seat (1.2) from the cooling box and put it on the housing with the heated head

The housing for the valve seats on the head should be clean and dry.

10

Install the seat (1,2) on the head (3)

Quickly install the cooled seat on the heated head.

Use an appropriate mandrel

11

Machine the valve seat (1,2)

AR05.30-B-4511E

12

Install the valves

Engines 457.9 vehicles 382.15, 693, 695, 696

Use new valves, or 

AR05.30-B-3511E

Engines 457.9 vehicles 958.4

Use new valves, or 

AR05.30-B-3511TC

Rework the exhaust valve to be reused.

Do not rework the intake valve.

AR05.30-B-4202C

Número

Denominação

Engine 457.9; 460.984

BE05.30-B-1003-02B

Valve guide internal diameter (final finishing)

Normal

mm

9.000...9.022

wear limit

mm

9.050

Número

Denominação

Engine 457.9,

BE05.30-B-1001-03D

External diameter (A) of the intake valve case

Normal

mm

47.390...47.410

Repair I

mm

47.770...47.810

repair II

mm

-

BE05.30-B-1002-03D

External diameter (A) of the exhaust valve case

Normal

mm

43.080...43.090

Repair I

mm

43.280...43.290

repair II

mm

43.480...43.490

BE05.30-B-1003-03D

Diameter (B) of the intake valve case housing in the head

Normal

mm

47.300...47.325

Repair I

mm

47.500...47.525

repair II

mm

47.700...47.725

BE05.30-B-1004-03D

Diameter (B) of the exhaust valve case housing in the head

Normal

mm

43.000...43.025

Repair I

mm

43.200...43.225

repair II

mm

43.400...43.425

BE05.30-B-1005-03D

Interference between the valve case and the housing in the head

Intake

mm

0.065...0.110

Exhaust

mm

0.055...0.090

BE05.30-B-1006-03D

Height (D) of the intake valve case

Normal

mm

7.6...7.8

Repair I

mm

8.0...8.2

repair II

mm

-

BE05.30-B-1007-03D

Height (D) of the exhaust valve case

Normal

mm

7.7...7.8

Repair I

mm

7.9...8.0

repair II

mm

8.1...8.2

BE05.30-B-1009-03D

Depth (C) of the intake valve case housing in the head

Normal

mm

10.9...11.1

Repair I

mm

11.1...11.3

repair II

mm

11.3...11.5

BE05.30-B-1010-03D

Depth (C) of the exhaust valve case housing in the head

Normal

mm

10.9...11.1

Repair I

mm

11.1...11.3

repair II

mm

11.3...11.5